03/05/85  Hardcore Wait Event Identifiers

The ring-0 wait/notify protocol requires that a 36-bit identifier be
supplied to indicate the event of interest.  When a process waits,
this event identifier is specified by the process that notices that
the event has occurred (i.e., the process that notifies the event).
This info segment contains a description of all wait identifiers in
use by the system, with a brief description of each.  The identifiers
are given in octal, with ASCII interpretations where appropriate.


Wait event identifiers:
000000000071
   tty_buf lock
000000000072
   FNP dump/patch event
000000000073
   FNP meter event
000000000074
   tty_area lock
000000000105
   Syserr log event (lock on paged syserr_log header)
000000002000
   User unlock event (wire_proc)
000555000000
   System search rules lock


000000xxxxxx
   Page I/O Event (xxxxx is the offset of the PTW in sst_seg)
143150xxxxxx ("ch"xx)
   IOI channel table entry (cte) lock event (xxxxxx is the offset of
   the cte in ioi_data)
144142155137 ("dbm_")
   Volume Dumper bit map lock
144154141171 ("dlay")
   Set when a process wishes to delay briefly in ring 0
144155160162 ("dmpr")
   Volume Dumper Label-Read lock
144162154163 ("drls")
   Directory lock table event
144163153167 ("dskw")
   Disk wait event


144166xxxxxx ("dv"xx)
   IOI device table entry (dte) lock event (xxxxxx is the offset of the
   dte in ioi_data)
146156160144 ("fnpd")
   FNP dump segment event
151157141164 ("ioat")
   I/O Attach Table
151157160164 ("iopt")
   I/O page table lock event
160164154167 ("ptlw")
   Global page table lock
164141160145 ("tape")
   Tape IO Event
200000000000
   Temp wiring event


333000000xxx
   VTOC I/O Event (xxx is the index into the VTOC buffer array, if xxx
   is between 1 and the number of VTOC buffers)
   Global VTOC Buffer Lock (if xxx is 1 + the number of VTOC buffers)
301000000xxx
   Pvtx hold lock
400000000000
   Global AST lock
444000xxxxxx
   Volmap lock
445000xxxxxx
   Volmap idle lock
446000xxxxx
   VTOC map lock


55500000000
   Volume Scavenger lock
66600000000
   Page control lock for DM
777777777776
   salv_data lock (for online salvaging)
xxxxxxxxxxxx
   Directory Lock Event, where xxxxxxxxxxxx is the unique-identifier of
   the directory (note that 777777777777 is the unique-identifier of
   the root directory).


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Historical Background

This edition of the Multics software materials and documentation is provided and donated
to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. 
as a contribution to computer science knowledge.  
This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology,
Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL
and BULL HN Information Systems Inc. to the development of this operating system. 
Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970),
renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership
of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture 
for managing computer hardware properly and for executing programs. Many subsequent operating systems 
incorporated Multics principles.
Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., 
as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. .

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Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without
fee is hereby granted,provided that the below copyright notice and historical background appear in all copies
and that both the copyright notice and historical background and this permission notice appear in supporting
documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining
to distribution of the programs without specific prior written permission.
    Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc.
    Copyright 2006 by BULL HN Information Systems Inc.
    Copyright 2006 by Bull SAS
    All Rights Reserved